JP2015033684A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine maintaining a necessary and sufficient washing capability while suppressing the discharge amount of a washing liquid.SOLUTION: A washing machine 1 comprises: a tank 50 to store a washing liquid; a body 20 equipped with a pump 60 to pressurize the washing liquid supplied from the tank 50, an electric motor being the driving source of the pump 60 and a battery pack 62 being the power source of the electric motor; an injector with a nozzle; and a pressure hose to connect between the body 20 and the injector. The discharge pressure (A) of the washing liquid is 0.5 [MPa] or more and 9.0 [MPa] or less. A pressure water amount ratio (A/B) of the discharge pressure (A) of the washing liquid to the discharge amount (B) of the washing liquid is 1.8 or more.

Description

  The present invention relates to a cleaning machine that discharges pressurized liquid to clean an object to be cleaned.

  The above-described cleaning machine has a main body including a pump for pressurizing the liquid and an injection device connected to the main body, and the injection device is provided with a nozzle for discharging the liquid pumped from the main body. (See Patent Document 1). Note that the liquid discharged (injected) from the cleaning machine may be tap water or a liquid containing a detergent or an abrasive. Therefore, in this specification, the liquid discharged (injected) from the cleaning machine may be collectively referred to as “cleaning liquid”.

JP 2005-313008 A

  In one of the conventional washing machines, the main body and a water tap are connected via a hose. Another conventional cleaning machine is provided with a tank for storing a cleaning liquid. A cleaning liquid (tap water) is continuously supplied to the former cleaning machine. That is, there is no limit to the amount of cleaning liquid that can be used during work. On the other hand, in the latter cleaning machine, when the cleaning liquid stored in the tank is used up, the operation must be interrupted and the tank must be replenished with the cleaning liquid. Therefore, in order to extend the continuous working time, it is necessary to increase the tank capacity or reduce the discharge amount of the cleaning liquid per unit time. However, increasing the tank capacity increases the size of the washing machine. In addition, when a large capacity tank is fully loaded with cleaning liquid, the tank becomes heavier and the burden on the operator who carries the tank increases.

  On the other hand, the cleaning capability of the cleaning machine depends on the product (discharge pressure × discharge amount) of the pressure of the cleaning liquid (discharge pressure) and the amount of the cleaning liquid (discharge amount). Therefore, simply reducing the discharge amount of the cleaning liquid reduces the cleaning ability.

  An object of the present invention is to maintain a necessary and sufficient cleaning ability while suppressing the discharge amount of the cleaning liquid.

  The cleaning machine of the present invention is a cleaning machine that pressurizes and discharges the cleaning liquid supplied from the tank, and the discharge pressure (A) of the cleaning liquid is 0.5 [MPa] or more and 9.0 [MPa] or less, The pressure water amount ratio (A / B), which is the ratio of the discharge amount (B) [L / min] of the cleaning liquid to the discharge pressure (A) [MPa] of the cleaning liquid, is 1.8 or more.

  In one embodiment of the present invention, the discharge pressure (A) is 0.5 [MPa] or more and 3.0 [MPa] or less.

  In another aspect of the invention, the discharge pressure (A) is a maximum discharge pressure.

  In another aspect of the invention, the discharge amount (B) is 1 [L / min].

  In another aspect of the present invention, the flow path includes a nozzle including an inflow port into which the cleaning liquid flows, a discharge port from which the cleaning liquid is discharged, and a flow path that connects the inflow port and the discharge port. The minimum value of the diameter is 0.9 [mm] or less.

  In another aspect of the present invention, the cleaning machine includes a tank that stores cleaning liquid, a pump that pressurizes cleaning liquid supplied from the tank, an electric motor that is a driving source of the pump, and a secondary battery that is a power source of the electric motor. A main body including the nozzle, an injection device including the nozzle, and a pipe member connecting the main body and the injection device.

  In another aspect of the present invention, the secondary battery can supply electric power of 140 [W] or more to the electric motor.

  In another aspect of the present invention, the electric power supplied from the secondary battery to the electric motor has a first conversion efficiency (η1) for converting the electric power of the secondary battery into a rotational motion of the electric motor. It is electric power in the case of% to 80%.

  In another aspect of the invention, the electric power required for driving the pump is 70 [W] or more.

  In another aspect of the present invention, the electric power necessary for driving the pump has a second conversion efficiency (η2) for converting the rotational movement of the electric motor into the reciprocating movement of the pump of 50% to 80%. Is the power of the case.

  In another aspect of the present invention, the secondary battery can supply power of 20 [Wh] or more to the electric motor.

  In another aspect of the invention, the pump includes a single reciprocating member driven by the electric motor, and the discharge pressure is pulsated by the single reciprocating member.

  In another aspect of the invention, the discharge pressure is pulsated with a variation rate of 20% or more.

  In another aspect of the invention, the secondary battery is for a power tool.

  The cleaning machine of the present invention is a cleaning machine that pressurizes and discharges the cleaning liquid supplied from a tank, and includes a cylinder and a plunger that is reciprocally accommodated in the cylinder, and a pump that pressurizes the cleaning liquid, and an electric motor A crankshaft for converting the rotational movement of the motor into the reciprocating movement of the plunger. The crankshaft is provided with a counterweight that rotates integrally with the crankshaft.

  The cleaning machine of the present invention is a cleaning machine that pressurizes and discharges the cleaning liquid supplied from a tank, and includes a cylinder and a plunger that is reciprocally accommodated in the cylinder, and a pump that pressurizes the cleaning liquid, and an electric motor A conversion mechanism that converts the rotational movement of the motor into a reciprocating movement of the plunger, a main body that houses the pump and the conversion mechanism, an injection device that is connected to the main body via a pipe member, and the main body. And a connection port to which one end of the pipe member is connected, and a linear flow path provided in the main body and communicating the pump and the connection port. And the said plunger and the said flow path are arrange | positioned in the same plane.

  According to the present invention, it is possible to maintain a necessary and sufficient cleaning ability while suppressing the discharge amount of the cleaning liquid.

It is an external appearance perspective view of the main body and tank of a washing machine concerning a 1st embodiment. It is a side view of the washing gun of the washing machine concerning a 1st embodiment. It is sectional drawing of the nozzle incorporated in a washing | cleaning gun. It is a longitudinal cross-sectional view of a main body and a tank. It is a cross-sectional view of a main body. It is a figure which shows the theoretical discharge waveform of the washing | cleaning liquid by a 1 plunger system. It is a figure which shows the actual discharge waveform of the washing | cleaning liquid by 1 plunger system. It is a figure which shows the average value of the discharge pressure in a washing machine currently marketed, discharge amount, pressure water amount ratio, and a nozzle diameter. It is a figure which shows the relationship between the discharge pressure and nozzle diameter in the washing machine currently marketed. It is a figure which shows the main components of the washing machine which concerns on 1st Embodiment. It is a figure which shows the relationship between a rated voltage, battery capacity, battery energy, an output, and working time. It is a figure which shows some examples of the combination of the discharge pressure, discharge amount, pressure water amount ratio, and nozzle diameter in the washing machine of this invention. It is a fragmentary sectional view which shows an example of the positional relationship of a pump and an outflow channel.

(First embodiment)
Hereinafter, an example of a washing machine to which the present invention is applied will be described in detail with reference to the drawings. The cleaning machine 1 according to the present embodiment has a main body 20 shown in FIG. 1 and a cleaning gun 30 as an injection device shown in FIG. The main body 20 shown in FIG. 1 and the cleaning gun 30 shown in FIG. 2 are connected via a pressure-resistant hose 40 (FIG. 2) as a pipe member. One end of the pressure hose 40 is fixed to the cleaning gun 30, and the other end of the pressure hose 40 is detachable from the main body 20 (FIG. 1).

  As shown in FIG. 1, a tank 50 is mounted on the main body 20, and the main body 20 and the tank 50 have a substantially rectangular parallelepiped appearance as a whole. A connection port 21 to which one end of the pressure hose 40 shown in FIG. 2 is connected is provided on the front surface of the main body 20. When a main switch (not shown) provided in the main body 20 is operated, a cleaning liquid pressurized by a pump to be described later is discharged from the connection port 21 and the pressure-resistant hose 40 connected to the connection port 21 (FIG. 2). ) To the cleaning gun 30 (FIG. 2). When the trigger 31 provided on the cleaning gun 30 is operated, the cleaning liquid supplied to the cleaning gun 30 is discharged from the tip of the cleaning gun 30 toward an object to be cleaned (not shown).

  A metal nozzle 32 shown in FIG. 3 is built in the tip of the cleaning gun 30 shown in FIG. The nozzle 32 communicates the inlet 34 communicating with the connection flow path 33 formed inside the cleaning gun 30, the outlet 35 for discharging (injecting) the cleaning liquid, and the inlet 34 and the outlet 35. And a flow path 36. That is, the cleaning liquid supplied to the cleaning gun 30 via the pressure hose 40 shown in FIG. 2 flows into the nozzle 32 via the connection flow path 33 shown in FIG. Specifically, it flows into the nozzle 32 from the inlet 34 of the nozzle 32. The cleaning liquid that has flowed into the nozzle 32 passes through the flow path 36, reaches the discharge port 35, and is discharged from the discharge port 35 to the outside. Here, the flow path 36 formed in the nozzle 32 includes a front portion 36a having a relatively large diameter and a rear portion 36b having a relatively small diameter. Therefore, in the present embodiment, the diameter of the flow path rear portion 36 b corresponds to the minimum diameter of the flow path 36. However, there is also an embodiment in which the diameter of the flow path 36 is uniform. In any case, the minimum value of the diameter of the flow path 36 is preferably 0.9 [mm] or less, and is 0.75 [mm] in the present embodiment. That is, the diameter of the flow path rear portion 36b shown in FIG. 3 is 0.75 [mm]. In the following description, the diameter of the flow path rear portion 36b may be referred to as “nozzle diameter”. In the nozzle 32 shown in FIG. 3, the diameter of the discharge port 35 and the nozzle diameter are substantially the same, but the diameter of the discharge port 35 may be smaller or larger than the nozzle diameter.

  At both ends of the flow path front portion 36a, taper portions that gradually taper along the flow direction of the cleaning liquid are formed. Further, an O-ring 37 as a seal member is disposed between the outer peripheral surface of the nozzle 32 and the inner peripheral surface of the cleaning gun 30 to enhance water tightness. In addition, a seal member is appropriately disposed at a place other than between the outer peripheral surface of the nozzle 32 and the inner peripheral surface of the cleaning gun 30 to enhance water tightness.

  As shown in FIG. 4, the tank 50 is overlaid on the main body 20. Specifically, a plurality of convex portions 51 are formed on the bottom surface of the tank 50, while a plurality of concave portions 22 are formed on the top surface of the main body 20. And the tank 50 is positioned by the convex part 51 currently formed in the tank bottom face fitting in the recessed part 22 currently formed in the main body upper surface. Further, as shown in FIG. 1, buckles 23 are provided on the front surface and the back surface of the main body 20, and locking portions 52 are provided on the front surface and the back surface of the tank 50. Then, when the buckle 23 provided on the main body 20 is locked to the locking portion 52 provided on the tank 50, the tank 50 is fixed to the main body 20. That is, when the buckle 23 is locked to the locking portion 52, the main body 20 and the tank 50 are connected and integrated. On the other hand, when the locking of the buckle 23 to the locking portion 52 is released, the connection between the main body 20 and the tank 50 is released, and the main body 20 and the tank 50 can be separated. Accordingly, when the connection between the main body 20 and the tank 50 is released, and the tank 50 is lifted by holding the handle 53 provided in the tank 50, the tank 50 is separated from the main body 20, and only the tank 50 can be carried. it can. For example, when the cleaning liquid (tap water) is put into the tank 50, only the tank 50 can be carried to a place where a tap is installed. The tank 50 is provided with a screw-in type cap 54. The cap 54 is removed when the cleaning liquid is put into the tank 50 or when the cleaning liquid in the tank 50 is discarded.

  As shown in FIGS. 4 and 5, the main body 20 includes a pump 60 that pressurizes the cleaning liquid supplied from the tank 50, an electric motor 61 that is a drive source of the pump 60, and a battery that is a power source of the electric motor 61. A pack 62 is accommodated. The battery pack 62 in the present embodiment accommodates a rechargeable secondary battery and can be attached to an electric tool such as an impact driver. In this embodiment, two sets of four lithium ion batteries connected in series are connected in parallel. The rated voltage of each lithium ion battery is 3.6 [V], and the capacity is 1.5 [Ah]. That is, a total of eight lithium ion batteries are accommodated in the battery pack 62. In other words, the battery pack 62 is a battery pack having a rated voltage of 14.4 [V] and a capacity of 3.0 [Ah]. The secondary battery may be a nickel metal hydride battery or a nickel cadmium battery instead of a lithium battery.

  The pump 60 is a plunger pump including a cylinder 60a and a plunger 60b as a reciprocating member accommodated in the cylinder 60a so as to be capable of reciprocating. The rotational motion of the electric motor 61 is converted into the reciprocating motion of the plunger 60 b by the conversion mechanism 63 interposed between the electric motor 61 and the pump 60. As shown in FIG. 5, the electric motor 61 includes an output shaft 61a having a pinion formed therein, and a crankshaft 64 is disposed in the vicinity of the output shaft 61a. The crankshaft 64 includes a gear 64a meshing with a pinion formed on the output shaft 61a of the electric motor 61, a first shaft portion 64b protruding from one surface of the gear 64a, and a second shaft portion protruding from the other surface of the gear 64a. And an eccentric shaft made of 64c. The first shaft portion 64b and the second shaft portion 64c are rotatably supported by bearings. Further, the center of the first shaft portion 64b coincides with the center of the gear 64a, while the center of the second shaft portion 64c does not coincide with the center of the gear 64a. That is, the second shaft portion 64c is eccentric with respect to the gear 64a and the first shaft portion 64b. The second shaft portion 64 c is connected to the plunger 60 b of the pump 60 via the connecting rod 65. Specifically, one end of the connecting rod 65 is rotatably connected to the second shaft portion 64c, and the other end of the connecting rod 65 is rotatably connected to the plunger 60b. Accordingly, when the output shaft 61a of the electric motor 61 rotates, the second shaft portion 64c rotates around the centers of the gear 64a and the first shaft portion 64b and is connected to the second shaft portion 64c via the connecting rod 65. The plunger 60b is reciprocated in the cylinder 60a. That is, the amount of eccentricity of the second shaft portion 64c with respect to the gear 64a and the first shaft portion 64b corresponds to the stroke amount of the plunger 60b.

  Here, in a washing machine including two or more plunger pumps, vibrations associated with the reciprocating movement of the plunger and the eccentric rotation of the crankshaft can be canceled by shifting the phases of the plunger pumps. However, large electric power is required to drive a plurality of plunger pumps. On the other hand, since the washing machine 1 according to the present embodiment uses the battery pack 62 as a power source, it is required to reduce the power consumption as much as possible to extend the continuous operation time. For this reason, the cleaning machine 1 is provided with only one pump (plunger pump) 60. That is, the 1-plunger system is employed in the washing machine 1 according to the present embodiment, and the vibrations cannot be offset by shifting the phases of the plurality of plunger pumps. Therefore, as shown in FIGS. 4 and 5, in the washer 1 according to the present embodiment, a counterweight 66 is provided on the crankshaft 64. Specifically, a counterweight 66 is provided at the base of the second shaft portion 64c. Therefore, in the washing machine 1 according to this embodiment, the counterweight 66 that rotates integrally with the crankshaft 64 suppresses vibrations associated with the reciprocating movement of the plunger 60b and the eccentric rotation of the crankshaft 64.

  Further, in the cleaning machine 1 according to this embodiment in which the 1 plunger method is adopted, the discharge amount of the cleaning liquid is reduced. A conventional general washing machine includes three plunger pumps. That is, the conventional three-plunger system is adopted for the washing machine. In the three-plunger system, the three plungers are driven back and forth with a phase difference of 120 degrees. Therefore, the cleaning liquid is continuously discharged with almost no pulsation. Therefore, a conventional cleaning machine that employs the three-plunger method can continuously discharge at high pressure, but consumes a large amount of cleaning liquid.

  On the other hand, in the washing machine 1 of the present embodiment that employs the 1 plunger system, the above-described drawbacks of the 3 plunger system washing machine are solved. Further, in the cleaning machine 1 of this embodiment that adopts the one-plunger method, theoretically, the amount of cleaning liquid discharged from the cleaning gun 30 (nozzle 32) while the plunger 60b reciprocates once (the crankshaft 64 makes one rotation). (Discharge amount) varies as shown in FIG. That is, 100% pulsation occurs. That is, in the cleaning machine 1 according to the present embodiment, the amount of cleaning liquid used within the same time is reduced to about 1/3 as compared with the 3-plunger type cleaning machine. That is, the consumption of the cleaning liquid is suppressed while maintaining the discharge pressure.

  In the cleaning machine 1 according to the present embodiment, cleaning is performed with the cleaning liquid stored in the tank 50. That is, the amount of cleaning liquid is limited. On the other hand, in many conventional cleaning machines, cleaning is performed with a cleaning liquid (tap water) supplied from the water supply. That is, the cleaning liquid is supplied almost infinitely. Therefore, there is no problem in adopting the 3-plunger method in the conventional washing machine. On the other hand, when the 3-plunger method is employed in the cleaning machine 1 of this embodiment that performs cleaning with the cleaning liquid stored in the tank 50, the cleaning liquid in the tank 50 is used up in a short time. Therefore, the 1-plunger system that can reduce the consumption of the cleaning liquid while maintaining a discharge pressure equivalent to that of the 3-plunger system is suitable for the tank-type cleaning machine 1 having a limited supply amount of the cleaning liquid. Thereby, the working time can be lengthened.

  Also, in the 1 plunger system, the sliding resistance of the reciprocating member is reduced to about 1/3 compared to the 3 plunger system. In the three-plunger system, three plungers are driven to reciprocate, so that the sliding resistance between the plunger and the cylinder that supports the plunger is large, and the power consumption increases. On the other hand, in the washing machine 1 of the present embodiment that employs the 1 plunger method, the sliding resistance is reduced to about 1/3, so that power consumption is reduced. That is, in the cleaning machine 1 according to the present embodiment, the reciprocating motion of the plunger 60b, that is, the rotation efficiency of the electric motor 61 is improved, and the power consumption is reduced.

  In the cleaning machine 1 according to the present embodiment, the electric motor 61 is driven by the power supply from the battery pack 62. That is, the power supplied to the electric motor 61 is limited. On the other hand, since the conventional washer is supplied with power from a commercial power supply, the power supply is almost infinite. When a commercial power source is used, there is no problem even if a three-plunger method with a small power saving effect is adopted. On the other hand, when the 3-plunger method is adopted in the cleaning machine 1 of the present embodiment using the battery pack 62 as a power source, the electric power of the battery pack 62 is lost in a short time, and the electric motor 61 cannot be driven. Therefore, the cordless type (battery-driven) washing machine 1 with limited power supply can improve the rotation efficiency of the electric motor 61 while maintaining the same discharge pressure as the three-plunger method, and the power consumption of the battery pack 62 A one-plunger method that can suppress the above is suitable. Thereby, the working time can be lengthened.

  Further, in the three-plunger system, an electric motor having a large rated output is required to overcome the sliding resistance of the three plungers, and the product itself is large and heavy. On the other hand, in the 1 plunger system in which the number of plungers is small and the sliding resistance is small compared to the 3-plunger system, a small electric motor is sufficient, and the number of parts can be reduced. Therefore, the product itself can be reduced in size and weight. In short, the washing machine 1 of the present embodiment adopting the 1 plunger system is a cordless type (not required to be connected to a commercial power source) washing machine 1 that is small and lightweight and is driven by the battery pack 62. In other words, the cleaning machine 1 according to the present embodiment is an easy-to-use cleaning machine that is easy to carry and work by hand and does not limit the place of use.

  In practice, the connection port 21 shown in FIG. 1 receives pressure from the pressure hose 40 side that impedes discharge of the cleaning liquid. That is, since the minimum value of the diameter of the flow path 36 is as small as 0.9 [mm] or less (0.75 [mm] in this embodiment), it is difficult to discharge the cleaning liquid. When the pressure at the connection port 21 increases, the pressure hose 40 expands and suppresses pulsation, so that 100% pulsation (flow rate fluctuation) as shown in FIG. 6 does not occur.

  In an extreme example, the pulsation of the cleaning liquid discharged from the nozzle 32 is close to 0% when the plunger 60b is reciprocated at a high speed (the pulsation is small), and 100 when the plunger 60b is reciprocated at a low speed. % (Pulsation increases). However, if the plunger 60b is reciprocated at an extremely high speed, the consumption of the cleaning liquid and power increases as in the case of the three plunger system. On the other hand, when the plunger 60b is reciprocated at an extremely low speed, there is a possibility that the cleaning ability is insufficient and vibration due to pulsation increases.

  Therefore, in the cleaning machine 1 according to the present embodiment, as shown in FIG. 7, the plunger is set so that the pulsation of the cleaning liquid discharged from the nozzle 32 is 20% or more, preferably 20% to 60%. The reciprocating motion (the number of reciprocations) of 60b, that is, the rotational speed of the electric motor 61 is controlled. Specifically, the rotation speed (the number of rotations) of the electric motor 61 is controlled in a range of 1000 [rpm] to 5000 [rpm]. As a result, it is possible to discharge the cleaning liquid at a pressure at which sufficient cleaning performance can be obtained while suppressing the consumption of the cleaning liquid. In addition, when the rotational speed (rotational speed) of the electric motor 61 is in the range of 1000 [rpm] to 5000 [rpm], the maximum discharge pressure of the cleaning liquid is in the range of 0.5 [MPa] to 3.0 [MPa]. become. In addition, the discharge pressure in this embodiment has shown the thing higher than the pressure (0.3 [MPa]) of a general water supply.

  Next, in the 1 plunger type washing machine 1, when the nozzle diameter is 0.75 [mm], the diameter (D), stroke (S), and electric motor of the plunger 60b for obtaining a discharge pressure of 2.0 [MPa]. The number of rotations of the motor 61 will be described in detail. The performance of the pump 60 depends on the diameter (D), the stroke (S), and the number of reciprocations (N) of the plunger 60b, and the discharge amount (B) of the cleaning liquid discharged per minute is expressed by Equation 1.

  (B) [L / min] = D [mm] × S [mm] × N [rpm] × α (Expression 1)

  In Equation 1, the diameter (D) is the radial dimension of the plunger 60b, the stroke (S) is the distance between the dead points of the plunger 60b, and α is a coefficient (a constant value). When the number of reciprocations (N) of the plunger 60b is constant (the rotation speed of the electric motor 61 is constant), in order to achieve a predetermined discharge amount (B) [L / min], the diameter (D) and stroke (S ) Need to be adjusted. Specifically, the diameter (D) is increased and the stroke (S) is decreased, or the diameter (D) is decreased and the stroke (S) is increased.

  When the diameter (D) is increased, the area through which the plunger 60b pushes out the cleaning liquid increases. For example, when the diameter (D) is 10 [mm], the thrust required to obtain a pressure of 2.0 [MPa] is 157 [kg] (= radius × radius × π × pressure). When the diameter (D) is increased by 2 [mm], the required thrust is 226 [kg]. That is, only by increasing the diameter (D) by 2 [mm], the thrust must be increased by 69 [kg]. In order to increase the thrust, the electric motor 61 must be changed to one having a high output (large size), and the cylinder 60a and the housing (main body 20) receiving the reaction force must be strengthened. This leads to an increase in size and cost of the cleaning machine 1.

  On the other hand, when the stroke (S) is increased, the amount of movement of the plunger 60b increases. For example, in order to extend the stroke (S) by 5 [mm], it is necessary to extend the radius of the crankshaft 64 by 2.5 [mm]. Further, when the stroke (S) is extended by 5 [mm], it is necessary to extend the entire length of the compression chamber (the chamber for storing the cleaning liquid on the side opposite to the crankshaft 64 of the plunger 60b) according to the extension distance of the stroke (S). is there. That is, if the stroke (S) is extended by 5 [mm], a total extension structure of 7.5 [mm] is required, and the washing machine 1 is increased in size. Furthermore, when the stroke (S) is extended by 10 [mm], it is necessary to extend the radius of the crankshaft 64 and the overall length of the compression chamber by 5 [mm], respectively.

  Furthermore, when the number of reciprocations (N) of the plunger 60b is constant, the time taken for one stroke is constant Δt [seconds], so the average plunger speed (U) [m / s] can be expressed by Equation 2.

  U [m / s] = N [rpm] ÷ 60 [seconds] × (S) [m] × 2 (Expression 2)

  When the number of reciprocations (N) of the plunger 60b is constant at 2000 [rpm], the speed (U) is 0.33 [m / s] when the stroke (S) is 5 [mm], and the stroke (S) is 10 If it is [mm], it becomes 0.67 [m / s]. That is, when the stroke (S) is doubled, the average plunger speed (U) [m / s] is also doubled. The plunger 60b reciprocates while contacting the cylinder 60a and the like. Therefore, when the speed is increased by increasing the stroke (S), it is necessary to use a material with higher wear resistance, leading to an increase in cost.

  Next, consider a case where the number of reciprocations (N) of the plunger 60b is variable. In the case of an arbitrary number of reciprocations (N), it is necessary to adjust the number of reciprocations (N) and displacement (J) in order to achieve a predetermined discharge amount (B). Here, the displacement volume (J) is obtained by multiplying the cross-sectional area of the plunger 60b by the stroke (S).

  If the number of reciprocations (N) is increased, the displacement volume (J) can be reduced, and the plunger 60b can be reduced in size. Since the pressure-resistant hose 40 is interposed between the plunger 60b and the nozzle 32, pulsation is suppressed by the expansion and contraction of the pressure-resistant hose 40. That is, when the cleaning liquid is discharged at high speed (finely), the discharge pulsation is reduced and the discharge amount restriction effect is reduced as compared with the theoretical discharge waveform of the single plunger system (FIG. 6).

  On the other hand, if the number of reciprocations (N) is reduced, the displacement volume (J) increases and the plunger 60b increases. In this case, the discharge pulsation becomes close to the theoretical discharge waveform (FIG. 6) of the one plunger system, that is, the discharge pulsation becomes large, and the effect of limiting the discharge amount can be enhanced. However, since the pulsation causes vibration, it is not preferable that the number of reciprocations (N) is extremely small.

  Accordingly, the diameter (D), stroke (S), and number of reciprocations (N) of the plunger 60b need to be set optimally in consideration of the size, cost, discharge amount, etc. of the product. The inventors of the present invention experimentally obtained an optimum range in which the discharge amount and the power consumption amount can be suppressed and the vibration can be suppressed while suppressing the increase in size and cost of the product. As a result, it is desirable that the plunger diameter (D) is in the range of 5 to 20 [mm], the stroke (S) is in the range of 3 to 10 [mm], and the number of times of plunger reciprocation (N) is in the range of 1000 to 5000 [rpm]. I got the knowledge. Therefore, in the present embodiment, when the nozzle diameter (minimum diameter) is 0.90 [mm] or less (preferably 0.75 [mm]), 3.0 [MPa] (preferably 2.0 [MPa] ), The plunger diameter (D) is 12 [mm], the stroke (S) is 5 [mm] (the eccentric amount of the crankshaft 64 is 2.5 [mm]), and the number of plunger reciprocations ( N) is set to 2000 [rpm]. Furthermore, in this embodiment, the counterweight 66 is provided to further suppress vibration.

  In the 1 plunger system, the discharge pulsation is theoretically 100% as shown in FIG. However, since the pressure hose 40 actually expands and contracts to function as a pressure accumulating chamber, the discharge amount (pulsation) does not become 100%, and the pulsation is in the range of 20 to 60% as shown in FIG. It becomes. Therefore, at least if the discharge pulsation is in the range of 20 to 60%, the discharge amount is reduced as compared with the conventional 3-plunger system.

  That is, when the discharge pulsation is 20 to 60% of the maximum discharge pressure (3.0 [MPa]), the minimum discharge pressure is 1.2 [MPa] to 2.4 [MPa]. If the maximum discharge pressure is 2.0 [MPa], the minimum discharge pressure is 0.8 [MPa] to 1.6 [MPa].

  Here, the duration of the maximum discharge pressure is a certain time (instant) during one reciprocation of the plunger 60b. That is, the time other than the time when the discharge pressure of the cleaning liquid is maximum is much longer. As shown in FIG. 7, the time during which the pulsation is within 20% (high pressure discharge) is the region (time) from t1 to t2 during one reciprocation of the plunger 60b, and the time during which the pulsation is 20% or more It is an area (time) other than. Therefore, if the maximum pressure region is a region within 20% of the pulsation, the time within the pulsation of 20% is about ¼ time during one reciprocation of the plunger 60b, and the discharge amount (consumption amount of the cleaning liquid) is reduced. Is done.

  From the above, in the case of the 1 plunger system, the discharge pressure is increased to a peak value equivalent to that of the 3 plunger system for each stroke of the plunger. At this time, the discharge pressure pulsates. Therefore, the consumption of the cleaning liquid is reduced as compared with the 3-plunger method in which the cleaning liquid is continuously discharged. A region A shown in FIG. 7 indicates the total amount of the cleaning liquid actually discharged (discharge amount (B)), that is, the work amount of the pump 60. Compared with the three-plunger method, the work amount of the pump 60 is about half (theoretically 1/3), and the power consumption of the battery pack 62 is suppressed.

  Further, in the cleaning machine 1 according to the present embodiment, the plunger 60 b is reciprocated by the crankshaft 64. Therefore, there is no sliding resistance as compared with the configuration in which the plunger is reciprocally driven by the rotating swash plate, and the power consumption is also suppressed in this respect.

  Refer to FIG. 5 again. Inside the main body 20, a first flow path 24 that connects the tank 50 (FIG. 4) and the pump 60 is provided. In addition, as shown in FIG. 4, a second flow path 25 that connects the pump 60 and the connection port 21 is also provided inside the main body 20. The cleaning liquid stored in the tank 50 is supplied to the pump 60 through the first flow path 24 and pressurized. The cleaning liquid pressurized by the pump 60 is sent to the connection port 21 via the second flow path 25. Therefore, in the following description, the first flow path 24 that connects the tank 50 and the pump 60 is referred to as an “inflow path 24”, and the second flow path 25 that connects the pump 60 and the connection port 21 is “outflow”. Called path 25 ". That is, the cleaning liquid stored in the tank 50 is supplied to the pump 60 through the inflow path 24 and pressurized. The cleaning liquid pressurized by the pump 60 is sent to the connection port 21 through the outflow path 25. As described above, the cleaning liquid sent to the connection port 21 is supplied to the cleaning gun 30 through the pressure hose 40 connected to the connection port 21 (FIG. 3).

  As shown in FIG. 5, one end of the inflow passage 24 is connected to an inlet provided on the end surface of the cylinder 60a, and the other end of the inflow passage 24 is connected to a tank 50 (FIG. 4). A plug is provided. Although illustration is omitted, a check valve is provided on the bottom surface of the tank 50, and when the tank 50 is stacked on the main body 20 as shown in FIG. And the inflow channel 24 communicate with each other. Specifically, the valve body of the check valve is pushed up by the connection plug and leaves the valve seat. Then, a gap is generated between the valve body and the valve seat, and the tank 50 and the inflow path 24 communicate with each other through this gap. The check valve is provided with a spring for pressing the valve body against the valve seat. When the tank 50 is pulled up from the main body 20, the valve body is automatically pressed against the valve seat and the gap is closed.

  One-way valves are provided at the inlet and the outlet of the cylinder 60a. When the plunger is retracted in the state where the tank 50 and the inflow passage 24 are communicated as described above (when the plunger moves to the right side of the drawing in FIGS. 4 and 5), the one-way valve provided at the inlet of the cylinder 60a is opened. On the other hand, the one-way valve provided at the outlet of the cylinder 60a is closed, and the cleaning liquid flows into the cylinder 60a. Next, when the plunger moves forward (moves to the left side in FIG. 4 and FIG. 5), the one-way valves provided at the inlet and outlet of the cylinder 60a are closed, and the cleaning liquid is pressurized in the cylinder 60a. Thereafter, when the pressure of the cleaning liquid in the cylinder 60a reaches a predetermined pressure, only the one-way valve provided at the outlet of the cylinder 60a is opened while the one-way valve provided at the inlet of the cylinder 60a is closed. The pressurized cleaning liquid is sent out from the cylinder 60a to the outflow path 25. The cleaning liquid sent to the outflow path 25 is sent to the connection port 21 through the outflow path 25 and discharged from the connection port 21.

  As shown in FIG. 4, the outflow path 25 is linear and is disposed in the same plane as the pump 60 (plunger 60 b). Specifically, the axis of the plunger 60b and the axis of the outflow passage 25 are located in the same plane. That is, the plunger 60b and the outflow path 25 are parallel to each other. By forming the outflow path 25 in a straight line and arranging it in the same plane as the plunger 60b, the pulsation of the cleaning liquid is suppressed, and vibrations of the pump 60 and other components are suppressed.

  The pressure of the cleaning liquid discharged from the connection port 21 as described above, that is, the maximum discharge pressure of the cleaning liquid is preferably 0.5 [MPa] or more and 9.0 [MPa] or less, and 0.5 [MPa] or more. More preferably, it is 3.0 [MPa] or less. In the cleaning machine 1 according to the present embodiment, the discharge pressure of the cleaning liquid is set to 2.0 [MPa].

  Here, as described above, the cleaning liquid discharged from the connection port 21 is supplied to the cleaning gun 30 (FIG. 2) via the pressure hose 40 (FIG. 2) connected to the connection port 21. In addition, as described above, the cleaning liquid supplied to the cleaning gun 30 flows into the flow path 36 from the inlet 34 of the nozzle 32 shown in FIG. That is, a series of flow paths are formed by the pressure hose 40 (FIG. 2) and the connection flow path 33 (FIG. 3) between the connection port 21 of the main body 20 and the inlet 34 of the nozzle 32. There is almost no pressure loss in the series of flow paths. In other words, the pressure of the cleaning liquid at the connection port 21 and the pressure of the cleaning liquid at the inlet 34 of the nozzle 32 are substantially the same. Therefore, the pressure of the cleaning liquid at any point in the series of flow paths formed by the pressure hose 40 (FIG. 2) and the connection flow path 33 (FIG. 3) is the same as the pressure of the cleaning liquid discharged from the connection port 21. it can. In other words, the pressure of the cleaning liquid measured at an arbitrary point in the series of flow paths formed by the pressure hose 40 (FIG. 2) and the connection flow path 33 (FIG. 3), and the pressure of the cleaning liquid at the connection port 21 Are substantially identical.

  As described above, the cleaning machine 1 of this embodiment in which the nozzle diameter is 0.75 [mm] and the discharge pressure of the cleaning liquid (particularly the maximum discharge pressure) is 2.0 [MPa] is shown in FIG. 1 [L] (1 liter) of cleaning liquid is discharged from the discharge port 35 of the nozzle 32 per minute. In other words, the ratio (A / B) of the discharge pressure (A) and the discharge amount (B) of the cleaning liquid in the cleaning machine 1 is 2.0. In the following description, the ratio (A / B) between the discharge pressure (A) and the discharge amount (B) of the cleaning liquid may be referred to as “pressure water amount ratio”.

  The table shown in FIG. 8 and the graph shown in FIG. 9 are a table and a graph showing the results of an investigation conducted by the present inventors on a currently marketed washing machine. The upper column of the table shown in FIG. 8 shows the average values of the discharge pressure, the discharge amount, the pressure water amount ratio, and the nozzle diameter in a plurality of cleaning machines driven by an AC power source (hereinafter “AC cleaning machine”). The middle column of the table shows the average values of discharge pressure, discharge amount, pressure water amount ratio, and nozzle diameter in a plurality of cleaning machines (hereinafter referred to as “DC cleaning machines”) driven by a DC power source. The lower column of the table shows the discharge pressure, discharge amount, pressure water amount ratio, and nozzle diameter in the cleaning machine 1 according to this embodiment. Moreover, the graph shown by FIG. 9 shows the relationship between the discharge pressure and the nozzle diameter in the AC washer, the DC washer, and the washer 1 according to this embodiment.

  As can be seen from the table shown in FIG. 8, the average value of the pressure water ratio (A / B) in the conventional washing machine is less than 1.5. In particular, the average value of the pressure water amount ratio (A / B) in the conventional DC washer is less than 0.5. That is, in the conventional cleaning machine, the discharge pressure is lower than the discharge amount. In other words, a conventional cleaning machine discharges a large amount of cleaning liquid at a low pressure.

  On the other hand, the pressure water amount ratio (A / B) in the washing machine 1 according to the present embodiment is 2.0. That is, the cleaning machine 1 according to the present embodiment discharges a small amount of cleaning liquid at a higher pressure than the conventional cleaning machine. Therefore, the cleaning machine 1 according to the present embodiment has a cleaning capability equivalent to or higher than that of a conventional cleaning machine. Furthermore, when the tank capacity is the same, the washing machine 1 according to this embodiment can be used continuously for a longer time than the conventional washing machine.

  Here, in the cordless type washing machine 1 having the tank 50 and using the battery pack 62 as a power source, the selection of the capacity of the battery pack 62 capable of obtaining high-pressure discharge (discharge pressure of tap water pressure 0.3 [MPa] or more) will be described. To do.

  As shown in FIG. 10, main components of the cleaning machine 1 are a battery pack 62, an electric motor 61, and a pump 60. The power supplied from the battery pack 62 is limited, and the power consumption depends on the efficiency of the electric motor 61 and the pump 60.

  Considering the conversion efficiency of each element, as shown in FIG. 10, the first conversion efficiency (η1) for converting the electric power of the battery pack 62 into the rotational motion of the electric motor 61 and the rotational motion of the electric motor 61 are pumped 60. There is a second conversion efficiency (η2) for conversion to the reciprocating motion (plunger 60b) of the (plunger 60b). Their conversion efficiency is ideally 100%. However, in practice, the first conversion efficiency (η1) is not 100% due to copper loss, iron loss, mechanical loss, etc., and the second conversion efficiency (η2) is not 100% due to mechanical loss, piping loss, etc. That is, if the battery pack 62 and the electric motor 61 corresponding to each conversion efficiency (η1, η2) are selected, the cordless type (battery drive) washing machine 1 capable of high-pressure discharge can be realized.

  First, based on the second conversion efficiency (η2), the motor output necessary for driving the pump 60 will be examined. The electric power W2 (motor output, second electric power) necessary for driving the pump 60 can be generally expressed by Equation 3 when the discharge pressure is (A) and the discharge amount is (B).

  W2 [W] = (A) [MPa] × (B) [L / min] × 1000 ÷ 60 ÷ (η2) (Equation 3)

  Here, when the discharge pressure (A) is 2.0 [MPa] and the discharge amount (B) is 1 [L / min], the second conversion efficiency (η2) is the same as the pump efficiency of a general washing machine. Is 50% to 80%, the power (W2) is about 40 to 70 [W]. Therefore, the electric power (W2) required for driving the pump 60 is about 40 to 70 [W]. The power (W2) when the discharge amount (B) is 1 [L / min] and the discharge pressure (A) is 0.5, 3.0, 9.0 [MPa] is about 10-20. [W], about 60 to 100 [W], about 190 to 300 [W].

  Next, the electric motor 61 is driven by electric power supplied from the battery pack 62. Therefore, the power W1 (first power) of the battery pack 62 necessary for obtaining power (W2) of about 40 to 70 [W] is considered. Since the power (W2) is a value obtained by multiplying the battery pack power (W1) and the first conversion efficiency (η1), the battery pack power (W1) is obtained by converting the power (W2) to the first conversion efficiency (η1). The value divided by.

  Here, when the electric motor 61 is a most commonly used DC motor, the motor efficiency is 50% to 80%. Therefore, assuming that the first conversion efficiency (η1) is 50% to 80%, when the discharge pressure (A) is 2.0 [MPa], the first power (W1) is about 50 to 140 [W]. . If the discharge pressure (A) is 0.5 [MPa], it is about 12 to 34 [W], if it is 3.0 [MPa], it is about 75 to 200 [W], and if it is 9.0 [MPa], it is about 240 to 600 [W]. It becomes. Therefore, when the discharge pressure (A) is 2.0 [MPa], the necessary power (W1) is 140 [W] in the most inefficient combination of the power (W2) and the power (W1). If the electric motor 61 is a brushless motor, the motor efficiency is improved, so there is no problem even if the power (W1) is less than 140 [W]. That is, the minimum power of the battery pack 62 can be set as appropriate according to the type of motor used.

  Next, the battery pack 62 will be described. As described above, the electric power required for the battery pack 62 is 140 [W] when the discharge pressure (A) is 2.0 [MPa]. On the other hand, if 8 [L] of cleaning liquid can be stored in the tank 50, it is desirable that all of the 8 [L] cleaning liquid can be discharged in one operation (one charge of the battery pack 62). Therefore, if the discharge amount (B) of the cleaning liquid is 1 [L / min], the battery pack 62 requires 18.7 [Wh] of battery energy (140 [W] × 8 [L] ÷ 1 [ L / min] = 1120 [W · min]).

  Consider the number of lithium ion batteries required to obtain an output 140 [W]. If the rated voltage of the lithium ion battery cell is 3.6 [V] and the discharge current is 20 [A], at least two battery cells are required (3.6 [V] × 2 (in series or parallel) × 20 [A] = 144 [W]). Therefore, for example, a battery pack of 7.2 [V] or more in which battery cells are connected in series can be used. The rated voltage [V] of the battery pack used in the power tool is generally 3.6, 7.2, 10.8, 14.4, 18.0, 25.2 or 36.0 [V]. It is. In addition, the battery capacity [Ah] of the battery pack used in the electric tool is generally 1.5, 2.0, 3.0, or 4.0 [Ah]. The battery voltage varies depending on the number of battery cells connected in series, and the battery capacity varies depending on the number of battery cells connected in parallel. For example, when two battery cells having a rated voltage of 3.6 [V] are connected in series, the battery voltage becomes 7.2 [V]. Further, when two battery cells having a battery capacity of 2.0 [Ah] are connected in parallel, the battery capacity is 4.0 [Ah]. Although the voltage and capacity of the battery cell vary depending on the cell manufacturer, a battery cell having a rated voltage of 3.6 [V] and a capacity of 2.0 [Ah] will be described as an example.

  For example, since the battery energy of a battery pack with a rated voltage of 14.4 [V] and a battery capacity of 1.5 [Ah] is 21.6 [Wh], the required battery energy of 18.7 [Wh] can be satisfied. That is, if the battery pack has a rated voltage of 14.4 [V] or higher, the required battery energy can be satisfied. Even if the battery pack has a rated voltage of 14.4 [V] or less, the required battery energy of 18.7 [Wh] can be satisfied if a predetermined number of battery cells are connected in parallel.

  Next, consider working time. For example, in the case of a battery pack with a rated voltage of 14.4 [V] and a battery capacity of 1.5 [Ah], the battery energy is 21.6 [Wh]. When the minimum power (W1) of the battery pack is 140 [W], the work can be performed for about 9 minutes (21.6 [Wh] × 60 [min] / 140 [W]). Therefore, if the discharge amount (B) is 1 [L / min], the cleaning liquid (8 L) in the tank 50 can be used up. That is, it is possible to secure a time during which the cleaning liquid in the tank 50 of the cleaning machine 1 can be used up.

  As described above, the battery pack 62 required to satisfy the necessary battery output 140 [W] and the battery energy 18.7 [Wh] and to secure the work time necessary to use up the 8 [L] cleaning liquid. The rated voltage [V], battery capacity [Ah], battery energy [Wh] and working time [minute] are as shown in the table of FIG. At this time, the discharge pressure (A) is 2.0 [MPa], the discharge amount (B) is 1 [L / min], the battery output (W1) is 140 [W], and the average discharge current (I) is 20 [A]. ] (Per battery cell).

  In this embodiment, the rated voltage of the battery pack 62 is 14.4 [V], and the battery capacity is 3.0 [Ah] or 4.0 [Ah]. Therefore, it is possible to secure a work time sufficient to use up the 8 [L] cleaning liquid stored in the tank 50.

  From the above, the washing machine 1 in consideration of the first conversion efficiency η1 (50 to 80%) from the battery pack 62 to the electric motor 61 and the second conversion efficiency η2 (50 to 80%) from the electric motor 61 to the pump 60. The minimum power (W2) required to drive the battery pack 62 was calculated as 70 [W], and the battery pack power (W1) was calculated as 140 [W]. In the calculation, it was assumed that the discharge pressure (A) was 2.0 [MPa] and the discharge amount (B) was 1 [L / min]. That is, the cordless type washing machine 1 can be provided by setting the power (W2) to 70 [W] or more and the battery pack power (W1) to 140 [W] or more. Furthermore, if it has an output of 140 [W] or more and battery energy of 18.7 [Wh] or more, all the cleaning liquid stored in the tank 50 can be discharged. In the present embodiment, since the electric motor 61 is described as a commutator DC motor, the conversion efficiency is set to 50% to 80%. However, if the brushless motor is used, the conversion efficiency is improved (80% or more), and the battery pack 62 is used. The power required for Assuming that the conversion efficiency (η1) of the brushless motor is 90%, the power (W2) is about 40 to 70 [W] or more (conversion efficiency (η2) is 50% to 80%), and the battery pack power (W1) is about 40-80 [W]. That is, even in the case of the lowest efficiency, the required battery pack power (W1) is about 80 [W].

  As described above, in the cleaning machine 1 according to the present embodiment, by using one pump 60 (plunger), the power consumption of the battery pack 62 and the discharge amount of the cleaning liquid are reduced, and the necessary and sufficient cleaning ability is provided. Maintained. The washing machine 1 of the present embodiment having such characteristics is particularly suitable for indoor use. Specifically, it is suitable for cleaning of air conditioner indoor units and screen doors, that is, house cleaning. This is because when a washing machine with a large discharge amount is used indoors, the discharged cleaning liquid may drip on the floor and cause the floor to become dirty. In addition, when a vinyl sheet or the like is previously laid on the floor in order to prevent the floor from being soiled, a large amount of cleaning liquid accumulates on the vinyl sheet, and subsequent processing requires time and effort. In this regard, according to the cleaning machine 1 of the present embodiment having a high cleaning capability with a small discharge amount, the possibility of the above inconvenience occurring is extremely low. In particular, when the discharge pressure is 0.5 [MPa] to 3.0 [MPa], the discharge pressure is neither too high nor too low. The air conditioner indoor unit and screen door can be cleaned without being damaged by pressure. In addition, the cleaning liquid does not bounce off the cleaning object. Incidentally, as shown in FIG. 8, the average discharge pressure of a general AC washer is 5 [MPa] or more, and the average discharge pressure of a general DC washer is 0.6 [MPa] or less. Of course, the washing machine 1 of this embodiment can be used not only indoors but also outdoors.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the cleaning machine 1 according to the embodiment, the discharge pressure (A) of the cleaning liquid is 2.0 [MPa], the discharge amount (B) of the cleaning liquid is 1 [L / min], and the pressure water amount ratio (A / B) ) Was 2.0, and the nozzle diameter was 0.75 [mm]. However, the above numerical value is an example, and the pressure water amount ratio (A / B) is 1. when the discharge pressure of the cleaning liquid (in particular, the maximum discharge pressure) is in the range of 0.5 [MPa] to 9.0 [MPa]. It has been confirmed by investigations and tests conducted by the present inventors that a necessary and sufficient cleaning ability can be obtained with a small discharge amount if the number is 8 or more. Here, the necessary and sufficient cleaning ability is based on the cleaning ability required when used for house cleaning. That is, the cleaning capacity necessary and sufficient for cleaning the air conditioner indoor unit, screen door, window, bathtub, kitchen sink, range hood, and the like can be obtained with a smaller discharge amount than in the past. Accordingly, FIG. 12 shows some examples of combinations of discharge pressure, discharge amount, pressure water amount ratio, and nozzle diameter that satisfy the above conditions.

  Moreover, in the washer 1 according to the embodiment, as shown in FIG. 5, the pump 60 (cylinder 60a and plunger 60b) and the outflow path 25 are arranged vertically. However, as shown in FIG. 13, the pump 60 (cylinder 60a and plunger 60b) and the outflow path 25 may be arranged in a line. That is, the outlet of the cylinder 60a and the connection port 21 may be connected in a straight line. According to this arrangement, the pulsation of the cleaning liquid is further suppressed, and vibrations of the pump 60 and the like are further suppressed. In the arrangement shown in FIG. 13, it is clear that the plunger 60b and the outflow passage 25 are located in the same plane.

  The pump 60 provided in the washing machine 1 according to the embodiment can be replaced with a gear pump or a diaphragm pump. However, gear pumps and diaphragm pumps have less pulsation than plunger pumps. That is, the counterweight 66 and the straight outflow path 25 are particularly effective when the pump 60 is a plunger pump.

DESCRIPTION OF SYMBOLS 1 Washing machine 20 Main body 21 Connection port 22 Recessed part 23 Buckle 24 First flow path (inflow path)
25 Second channel (outflow channel)
30 Cleaning Gun 31 Trigger 32 Nozzle 33 Connection Channel 34 Inlet 35 Discharge Port 36 Channel 36a Channel Front Part 36b Channel Rear Part 37 O-ring 40 Pressure Hose 50 Tank 51 Convex Part 52 Locking Part 53 Handle 54 Cap 60 Pump 60a cylinder 61 electric motor 61a output shaft 62 battery pack 63 conversion mechanism 64 crankshaft 64a gear 64b first shaft portion 64c second shaft portion 65 connecting rod 66 counterweight

Claims (16)

A cleaning machine that pressurizes and discharges cleaning liquid supplied from a tank,
The discharge pressure (A) of the cleaning liquid is 0.5 [MPa] or more and 9.0 [MPa] or less,
The pressure water amount ratio (A / B), which is the ratio of the discharge amount (B) [L / min] of the cleaning liquid to the discharge pressure (A) [MPa] of the cleaning liquid, is 1.8 or more.
washing machine.   The washing machine according to claim 1, wherein the discharge pressure (A) is 0.5 [MPa] or more and 3.0 [MPa] or less.   The washing machine according to claim 1 or 2, wherein the discharge pressure (A) is a maximum discharge pressure.   The washing machine according to claim 1 or 2, wherein the discharge amount (B) is 1 [L / min]. A nozzle comprising an inlet through which the cleaning liquid flows, a discharge outlet from which the cleaning liquid is discharged, and a flow path that connects the inlet and the outlet;
The minimum value of the diameter of the flow path is 0.9 [mm] or less,
The washer according to claim 1. A tank that stores the cleaning liquid, a pump that pressurizes the cleaning liquid supplied from the tank, an electric motor that is a driving source of the pump, and a main body that includes a secondary battery that is a power source of the electric motor;
An injection device comprising the nozzle;
A pipe member connecting the main body and the injection device,
The washer according to any one of claims 1 to 5.   The washing machine according to claim 6, wherein the secondary battery can supply electric power of 140 [W] or more to the electric motor.   The power supplied from the secondary battery to the electric motor is power when the first conversion efficiency (η1) for converting the power of the secondary battery into the rotational motion of the electric motor is 50% to 80%. The washing machine according to claim 7, wherein   The washing machine according to claim 7 or 8, wherein electric power required for driving the pump is 70 [W] or more.   The electric power required for driving the pump is an electric power when a second conversion efficiency (η2) for converting a rotary motion of the electric motor into a reciprocating motion of the pump is 50% to 80%. 9. The washing machine according to 9.   The washing machine according to any one of claims 6 to 10, wherein the secondary battery can supply electric power of 20 [Wh] or more to the electric motor. The pump includes a single reciprocating member driven by the electric motor;
The washing machine according to claim 6, wherein the discharge pressure is pulsated by the single reciprocating member.   The washing machine according to claim 12, wherein the discharge pressure is pulsated at a fluctuation rate of 20% or more.   The washing machine according to claim 6, wherein the secondary battery is for an electric tool. A cleaning machine that pressurizes and discharges cleaning liquid supplied from a tank,
A pump including a cylinder and a plunger accommodated in the cylinder so as to be reciprocally movable, and pressurizing the cleaning liquid;
A crankshaft for converting the rotary motion of the electric motor into the reciprocating motion of the plunger,
The crankshaft is provided with a counterweight that rotates integrally with the crankshaft.
washing machine. A cleaning machine that pressurizes and discharges cleaning liquid supplied from a tank,
A pump including a cylinder and a plunger accommodated in the cylinder so as to be reciprocally movable, and pressurizing the cleaning liquid;
A conversion mechanism for converting the rotary motion of the electric motor into the reciprocating motion of the plunger;
A main body containing the pump and the conversion mechanism;
An injection device connected to the main body via a pipe member;
A connection port provided in the main body and connected to one end of the pipe member;
A linear flow path provided in the main body for communicating the pump and the connection port;
The plunger and the flow path are arranged in the same plane,
washing machine.

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